Gearbox announced quietly last Friday that they were pretty much done with Battleborn. The game won’t be going offline anytime soon, but the developer said that they were done actively developing any new content for the game.
The Battleborn Community Manager posted a message from the Creative Director to the forums saying that the upcoming fall update would be the game’s last, and even it won’t be packed the brim with content.
Of course, this was done for myriad reasons. Battleborn was never super successful, so it was never going to last forever. And now most of Gearbox has been hard at work on a highly anticipated (albeit unannounced) project that’s all-but-confirmed to be Borderlands 3, which I was personally disappointed to hear wouldn’t be Borderworlds, but such is the way of things.
You can read the full announcement on the forums.